Opinion: Time to rethink trophic levels in aquaculture policy
Aquaculture policy often promotes production of low-trophic level species for sustain-able industry growth. Yet, the application of the trophic level concept to aquaculture is complex, and its value for assessing sustainability is further complicated by continual reformulation of feeds. The majority of fed farmed ï¬Âsh and invertebrate species are produced using human-made compound feeds that can differ markedly from the diet of the same species in the wild and continue to change in composition.